Taking swashplate axial piston pump as the research object,the wedge oil film temperature model of port pair in steady-state was established.Considering the effect of port pair surface morphology on oil film viscous fric-tion energy loss and heat conduction,the influence of rotating speed and load pressure on wedge oil film leakage,energy loss and temperature of port pair was analyzed in combination with the leakage of wedge oil film.The results show that load pressure has great influence on leakage and leakage energy loss.The greater the load pressure,the greater the leakage flow and leakage energy loss.The rotating speed mainly affects the viscous friction energy loss of port pair.The viscous friction energy loss increases with rotating speed.Both have an effect on oil film temperature of port pair,and the oil film temperature increases with load pressure.With the increase of rotational speed,the rate of oil film temperature increase gradually decreases from large too small.
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